By Greg Myre
Originally published on Fri April 26, 2013 1:46 pm
The U.S. has remained at arm's length during two years of bloodletting in Syria that has claimed some 70,000 lives. But when the White House said Thursday it believed Syria has used chemical weapons, even in small quantities, it immediately set off a renewed debate on whether the U.S. might pursue a more aggressive policy.
Here are some of the key issues now under discussion:
-- Is the U.S. sure that Syria used chemical weapons?
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